Damper Unit Stacked Bodies for Fuel Pump Pulsation
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Solution Overview
Problem
The existing damper units for high-pressure fuel pumps require inconvenient sequential positioning and stacking of damper bodies and elastic members, making installation cumbersome.
Innovation Solution
A damper unit with stacked damper bodies, an elastic member, and a stopper across the outer peripheral edges, which are unitized by the elastic member's biasing force, allowing for simple installation and ensuring proper alignment and pulsation suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple damper bodies and elastic members are sequentially positioned and stacked in the fuel chamber, then the damper unit can be assembled with proper alignment, but the installation work becomes inconvenient and cumbersome
Solution Approach 1:
The patent combines multiple damper bodies and elastic members into a single integrated assembly that is pre-aligned and pre-positioned as one unit. This merging of components eliminates the need for sequential positioning and stacking during installation, while maintaining proper alignment through the integrated design of the assembly.
Solution Approach 2:
The damper bodies and elastic members are pre-assembled and pre-aligned in the correct configuration before installation into the fuel chamber. This preliminary action of assembling and aligning components in advance removes the complexity of sequential positioning during actual installation, making the process convenient while ensuring precision.
2Manufacturing precision
If damper bodies are installed separately with sequential positioning, then proper alignment can be achieved, but the installation process becomes complex and time-consuming
Solution Approach 1:
Multiple damper bodies and elastic members are merged into a single integrated assembly that is installed as one unit. This combining of components into a pre-configured assembly eliminates the need for sequential positioning operations, thereby improving installation efficiency while maintaining positioning precision through the integrated design.
Solution Approach 2:
The correct positioning and alignment of damper bodies and elastic members is performed in advance during the assembly process, before installation into the fuel chamber. This preliminary action ensures that when the assembly is installed, proper positioning is already achieved, eliminating time-consuming sequential positioning operations.
3Ease of operation
If elastic member biasing force is used to unitize damper bodies, then installation is simplified, but the complexity of the unitization mechanism increases
Solution Approach 1:
The elastic member automatically performs the unitization function through its inherent biasing force, without requiring additional complex mechanisms or external actuation. The elastic member's natural elastic properties enable it to press against the damper bodies and maintain them in a unitized state, simplifying the overall mechanism while achieving the desired installation simplicity.
Solution Approach 2:
The unitization mechanism utilizes changes in the elastic member's physical state and biasing force parameters to achieve automatic unitization of damper bodies. By leveraging the elastic member's inherent mechanical properties and force characteristics, the system achieves simple installation without requiring complex additional mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables easy and efficient installation of the damper unit, preventing inclination and ensuring effective pulsation reduction in the fuel chamber, while maintaining the pulsation-suppressing function and preventing damage to components.
Implementation Method 1
an elastic member that is disposed between the damper bodies, and a stopper that is installed across outer peripheral edge portions of the damper bodies positioned at both ends
Implementation Method 2
the deformable-action portions are elastically deformed by fuel pressure accompanied by pulsation, the volume of the fuel chamber can be changed and pulsation is reduced
Data Source
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AI summary
There is provided a damper unit that allows a plurality of damper bodies to be installed by simple work. The damper unit 1 includes at least two damper bodies 2 and 2' that are installed in a housing space 11 so as to be stacked and include hermetically sealed spaces therein. The damper unit 1 further an elastic member 7 that is disposed between the damper bodies 2 and 2', and a stopper 8 that is installed across outer peripheral edge portions 2a and 2a' of the damper bodies 2 and 2' positioned at both ends.